* {
  padding: 0;
  margin: 0;
  box-sizing: border-box;
}
body {
  font-family: SourceHanSansCN;
  background-color: #E5E5E5;
  margin-bottom: 16vw;
}
ul,
ol {
  list-style: none;
}
input {
  border: none;
  outline: none;
}
a {
  text-decoration: none;
}
fl {
  float: left;
}
fr {
  float: right;
}
em,
i {
  font-style: normal;
}
a,
h1,
h2,
h3,
h4,
h5,
h6,
input,
select,
button,
option,
textarea,
optgroup {
  font-family: inherit;
  font-size: inherit;
  font-weight: inherit;
  font-style: inherit;
  line-height: inherit;
  color: inherit;
  outline: none;
}
